Godwine is correct, this does look like 福 in cursive script, however, (if it indeed is 福) the form itself is incorrect. There should not be a vertical line in the middle of that character. A short one can be written, and then it indicates a left hand side strokes of 口 and 田, but the line in that character goes from very top and it is perpendicular to the character base. In short, it is wrong.
Below, ink rubbing from a work by 智永 (Zhì Yǒng), from the Sui dynasty period (隋朝, 581 - 619). As you can see there is no vertical line in the middle.
There is a form in clerical script, where the 口 and 田 are combined with a vertical line on the left hand side, however, it is not showing on any of the cursive forms in the dictionary. I think someone based this on either seal script or clerical script. Seal script forms of 福 are quite popular. In those, both sides of 口 and 田 are often merged with vertical lines. If pictures are needed to understand this better, I will post them up.